我的JSON有三个数组对象的集合。每个数组本身都是三个其他对象的集合，总共有九个对象。 这是我的JSON：
{
"image1" : [{
"id": "table",
"source": "http://test.reinventio.tk/office-space-game-3/images/table.jpg",
"alert": [],
"explanation": "Tables are needed for maintaining a good posture and consequently, \n good health - an entrepreneur cant function with a perpetually aching \n back now, can he?"
}, {
"id": "computer",
"source": "http://test.reinventio.tk/office-space-game-3/images/computer.jpg",
"alert": [],
"explanation": "Whats work without a computer?"
}, {
"id": "ac",
"source": "http://test.reinventio.tk/office-space-game-3/images/ac.jpg",
"alert": [],
"explanation": "Air cons are luxuries. Besides, \nas an entrepreneur, \nyoure supposed to be sweating it out!"
}],
"image2" : [{
"id": "sofa",
"source": "http://test.reinventio.tk/office-space-game-3/images/sofa.jpg",
"alert": [],
"explanation": "Sofas are a luxury. Besides, \nstartups are all but cozy and cusiony, like a sofa!"
}, {
"id": "xbox",
"source": "http://test.reinventio.tk/office-space-game-3/images/xbox.jpg",
"alert": [],
"explanation": "Gaming in the office space is a strict no-no.\n For an entrepreneur, work itself is play!"
}, {
"id": "whiteboard",
"source": "http://test.reinventio.tk/office-space-game-3/images/whiteboard.jpg",
"alert": [],
"explanation": "Wall emulsion paint turns all your walls\n into gigantic whiteboards. So why waste money \non a small one?"
}],
"image3" : [{
"id": "pool",
"source": "http://test.reinventio.tk/office-space-game-3/images/pooltable.jpg",
"alert": [],
"explanation": "Pool-dreams are to be dreamt after your startup grows."
}, {
"id": "green",
"source": "http://test.reinventio.tk/office-space-game-3/images/inofficeplant.jpg",
"alert": [],
"explanation": "Landscaping in the office?\n Lifes not a golf course - especially \nfor a startup."
}, {
"id": "paper",
"source": "http://test.reinventio.tk/office-space-game-3/images/paper.jpg",
"alert": [],
"explanation": "Be a jugaadu and improvise to save costs \n- why would you want to buy paper when you can use the empty side\n of election pamphlets?"
}]
}
现在我想访问每个图像对象的source和id，比如'table'或'ac'。问题是它将图像对象赋予i。
这是我的JavaScript代码：
for(var rowCtr in a.imageTable){
var obj=rowCtr;
for(var colCtr =0;colCtr<obj.length;colCtr++){
var imageObject = obj[colCtr];
imageTable是JSON。
答案 0 :(得分：0)
如果变量imageTable将json引用为已发布，则将遍历包含id的对象的数组，如下所示：
var array = imageTable.image1; // or image2, image3
for(var i=0;i<array.length;i++){
console.log(array[i].id); // wil output table, computer, ac
}
var imageTable = {
"image1" : [{
"id": "table",
"source": "http://test.reinventio.tk/office-space-game-3/images/table.jpg",
"alert": [],
"explanation": "Tables are needed for maintaining a good posture and consequently, \n good health - an entrepreneur cant function with a perpetually aching \n back now, can he?"
}, {
"id": "computer",
"source": "http://test.reinventio.tk/office-space-game-3/images/computer.jpg",
"alert": [],
"explanation": "Whats work without a computer?"
}, {
"id": "ac",
"source": "http://test.reinventio.tk/office-space-game-3/images/ac.jpg",
"alert": [],
"explanation": "Air cons are luxuries. Besides, \nas an entrepreneur, \nyoure supposed to be sweating it out!"
}],
"image2" : [{
"id": "sofa",
"source": "http://test.reinventio.tk/office-space-game-3/images/sofa.jpg",
"alert": [],
"explanation": "Sofas are a luxury. Besides, \nstartups are all but cozy and cusiony, like a sofa!"
}, {
"id": "xbox",
"source": "http://test.reinventio.tk/office-space-game-3/images/xbox.jpg",
"alert": [],
"explanation": "Gaming in the office space is a strict no-no.\n For an entrepreneur, work itself is play!"
}, {
"id": "whiteboard",
"source": "http://test.reinventio.tk/office-space-game-3/images/whiteboard.jpg",
"alert": [],
"explanation": "Wall emulsion paint turns all your walls\n into gigantic whiteboards. So why waste money \non a small one?"
}],
"image3" : [{
"id": "pool",
"source": "http://test.reinventio.tk/office-space-game-3/images/pooltable.jpg",
"alert": [],
"explanation": "Pool-dreams are to be dreamt after your startup grows."
}, {
"id": "green",
"source": "http://test.reinventio.tk/office-space-game-3/images/inofficeplant.jpg",
"alert": [],
"explanation": "Landscaping in the office?\n Lifes not a golf course - especially \nfor a startup."
}, {
"id": "paper",
"source": "http://test.reinventio.tk/office-space-game-3/images/paper.jpg",
"alert": [],
"explanation": "Be a jugaadu and improvise to save costs \n- why would you want to buy paper when you can use the empty side\n of election pamphlets?"
}]
};
var array = imageTable.image1; // or image2, image3
for(var i=0;i<array.length;i++){
console.log(array[i].id); // wil output table, computer, ac
}
您可以展开它以使用嵌套循环迭代所有imageX个对象
var keys = Object.keys(imageTable);
for(var i=0;i<keys.length;i++){
var array = imageTable[keys[i]];
for(var j=0;j<array.length;j++){
console.log(array[j].id); // wil output table, computer, ac, sofa, xbox etc
}
}
var imageTable = {
"image1" : [{
"id": "table",
"source": "http://test.reinventio.tk/office-space-game-3/images/table.jpg",
"alert": [],
"explanation": "Tables are needed for maintaining a good posture and consequently, \n good health - an entrepreneur cant function with a perpetually aching \n back now, can he?"
}, {
"id": "computer",
"source": "http://test.reinventio.tk/office-space-game-3/images/computer.jpg",
"alert": [],
"explanation": "Whats work without a computer?"
}, {
"id": "ac",
"source": "http://test.reinventio.tk/office-space-game-3/images/ac.jpg",
"alert": [],
"explanation": "Air cons are luxuries. Besides, \nas an entrepreneur, \nyoure supposed to be sweating it out!"
}],
"image2" : [{
"id": "sofa",
"source": "http://test.reinventio.tk/office-space-game-3/images/sofa.jpg",
"alert": [],
"explanation": "Sofas are a luxury. Besides, \nstartups are all but cozy and cusiony, like a sofa!"
}, {
"id": "xbox",
"source": "http://test.reinventio.tk/office-space-game-3/images/xbox.jpg",
"alert": [],
"explanation": "Gaming in the office space is a strict no-no.\n For an entrepreneur, work itself is play!"
}, {
"id": "whiteboard",
"source": "http://test.reinventio.tk/office-space-game-3/images/whiteboard.jpg",
"alert": [],
"explanation": "Wall emulsion paint turns all your walls\n into gigantic whiteboards. So why waste money \non a small one?"
}],
"image3" : [{
"id": "pool",
"source": "http://test.reinventio.tk/office-space-game-3/images/pooltable.jpg",
"alert": [],
"explanation": "Pool-dreams are to be dreamt after your startup grows."
}, {
"id": "green",
"source": "http://test.reinventio.tk/office-space-game-3/images/inofficeplant.jpg",
"alert": [],
"explanation": "Landscaping in the office?\n Lifes not a golf course - especially \nfor a startup."
}, {
"id": "paper",
"source": "http://test.reinventio.tk/office-space-game-3/images/paper.jpg",
"alert": [],
"explanation": "Be a jugaadu and improvise to save costs \n- why would you want to buy paper when you can use the empty side\n of election pamphlets?"
}]
};
var keys = Object.keys(imageTable);
for(var i=0;i<keys.length;i++){
var array = imageTable[keys[i]];
for(var j=0;j<array.length;j++){
console.log(array[j].id); // wil output table, computer, ac, sofa, xbox etc
}
}
答案 1 :(得分：0)
当您使用for (variable in object)时，它会将variable设置为对象的键，而不是值。要访问这些值，您必须使用object[variable]。所以在你的情况下，它应该是：
for (var rowCtr in a.imageTable) {
var obj = a.imageTable[rowCtr];
答案 2 :(得分：0)
像这样你可以访问每个opicture的id和来源
var id = [];
var src= [];
for (var rowCtr in a.imageTable) {
id= a.imageTable[rowCtr].id;
src= a.imageTable[rowCtr].source;
}